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TRUCK Regulations

Clean Truck Check Program Registration Deadline Dec 31st


The deadline for registering your vehicle for the Clean Truck Check program (CTC), formerly known as the Heavy-Duty Inspection and Maintenance Program, is quickly approaching on December 31, 2023. The CTC was approved by the California Air Resources Board (CARB) in 2021 and includes nearly all non-gasoline vehicles with a gross vehicle weight rating over 14,000 pounds that operate in California. This includes public vehicles, trucks, buses, personal vehicles, California-registered motorhomes, single vehicle fleets, and vehicles registered outside of California (not including motorhomes).


Phase 2 of the program began October 1, 2023. This phase requires vehicle owners who are subject to the program to enter their vehicles in CARB’s Clean Truck Check database and pay an initial annual compliance fee of $30 dollars per vehicle by December 31, 2023. Phase 2 also includes freight contractor, broker, and applicable freight facility requirements for hiring compliant fleets, allowing access to the facility, and record keeping. Starting January 2024, all trucks driving in California will need proof of compliance to continue operating in the state.


Phase 3 of Clean Truck Check requires heavy-duty vehicle owners to conduct periodic emissions testing on their vehicle. This is similar to California’s Smog Check program for cars. Periodic testing begins in 2024 and applies to all compliance deadlines after July 1, 2024. Compliant tests may be submitted as early as April 2024. Periodic testing initially will be required twice per year for nearly all vehicles in the program. Agricultural vehicles and California-registered motorhomes are required to test once annually. If your vehicle is designated PNO (Planned Nonoperation) by the DMV, it will not need to be registered for this program. 


There is a webinar posted to view on the CTC process:


Commonly asked questions about Clean Truck Check.

  • Do I need to register my truck if it is part of the “Low-use exemption” (Under 1,000miles/annually - Bus and Truck program) YES

  • Does this apply to agriculture/me?

  • Do you own a non-gasoline truck over 14K GVW? YES

  • What about seasonal equipment that is only used for a few months? YES (if the vehicle falls into the definition of ag, provided below, it needs to be checked annually - if not classified as agriculture, biannually)

  • Do I need to register my trucks with SE (Specialty Equipment) plates? YES

  • What about an “implement of husbandry?” YES

  • What about trucks that are solely used on farm, designated as PNO by the DMV? NO

  • What happens if I don't register my truck? (DMV can withhold your registration and levy fines. CHP will be providing “on-road” enforcement.)

Reporting Database

Clean Truck Check handout

CARB Presentation


Truck Regulations


Image by Josiah Farrow

The U.S. Environmental Protection Agency has approved California’s plan to phase out the sale of diesel-fueled heavy-duty trucks, including the big rigs that transport much of the state’s agricultural goods, in the state’s efforts to reduce pollution and carbon emissions.

Under the state’s Advanced Clean Trucks rule, which was signed in 2020, half of all heavy-duty trucks sold in California will be zero-emission vehicles by 2035. The state plans to eliminate the sale of diesel-fueled trucks by 2045.

Hybrid and Zero Emission Truck and Bus Voucher Incentive Project (HVIP)

  • Voucher- Up to 90% of the total vehicle cost (minus taxes and fees) for private entities and up to 100% of the total vehicle cost (including taxes and fees) for public entities. Stacking with other state funding is not allowed (except for public transit buses), and all other public funding sources must be disclosed.

  • First come, first serve. $50 million available; set-asides for drayage, transit buses, school buses, and small fleets.

  • Public and private entities; a fleet with more than 100 vehicles is not eligible (public entities will be exempt)

  • Battery Electric; Plug-In Hybrid Electric; Hydrogen Fuel Cell, APUs

  • Between 8,501 and 80,000 lbs


Carl Moyer Memorial Air Quality Standards Attainment Program (Carl Moyer Program)

  • Grant provided by each Air District

  • Public and private entities

  • Class 4-8 diesel fueled heavy-duty trucks, solid waste collection vehicles, public agency and utility fleet vehicles and emergency vehicles.

  • CNG; Hybrid Electric; LNG; Battery Electric; Plug-In Hybrid Electric; Propane; RNG; Hydrogen Fuel Cell

  • Between 14,001 and 80,000 lbs.


Clean Off-Road Equipment (CORE) Voucher Incentive Project

  • Voucher- Funding can be combined with other incentives up to 100% of the total cost (minus taxes and fees). CORE funds are to be applied after any other incentives. This may require the CORE voucher to be reduced to ensure total funding does not exceed 100% of the total cost.

  • First-come, first-served

  • Businesses, non-profits, and government entities based in California or that have California-based affiliates

  • On- and off-road terminal tractors, truck- and trailer-mounted transport refrigeration units (TRUs), large forklifts and cargo-handling equipment, airport ground-support equipment, railcar movers and switcher locomotives, mobile power units (MPUs), construction equipment, agricultural equipment, commercial harbor craft, charging/refueling infrastructure equipment operated in disadvantaged communities

  • Fuel Cell; Battery Electric

  • Between 0 and 80,000 lbs.



  • Voucher-$750,000 max per project. $200 million available. Funding can be combined with other incentives up to 100% of the total cost (minus taxes and fees). 

  • Incentives for zero-emission vehicle (ZEV) infrastructure equipment for medium- and heavy-duty battery electric and hydrogen fuel cell vehicles in California. 

  • Businesses, non-profits, and government entities based in California or that have California-based affiliates. Requires proof of vehicle purchase or order.

  • Level 2, DCFC, hydrogen stations, software, and some construction costs. Covered costs vary by funding lane

  • Fuel Cell; Battery Electric


Clean Vehicle Rebate Project (CVRP)

  • Light duty vehicles



Special license plates that promote California agriculture are avilable for vehicles including cars, trucks, trailers and motorcycles.


Money collected through their sale benefits youth leadership development, career awareness and training activities primarily serving secondary students enrolled in state-adopted agricultural education programs throughout California.


The plates incorporate a design that includes a sunrise over a fertile green field. Superimposed over the field are the words, "Food, Fiber, Fuel, Flora." The word "agriculture," in red block letters, runs along the bottom of the plate underneath the license number.

Information about the special interest license plate may be found online at Other resources include the California Department of Motor Vehicles and the California FFA Foundation. You can also see your local DMV office or FFA chapter for details.

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